Answer
The nervous and skeletomuscular systems help maintain homostasis by regulating respiration.
Explanation:
The brain stem, consisting of the pons and medulla, represent the main respiratory center. According to Wikipedia, "an increased level of carbon dioxide in the blood, or a decreased level of oxygen, will result in a deeper breathing pattern and increased respiratory rate to bring the blood gases back to equilibrium."
This is an example of a homostastic response controlled by both of the organ systems referenced above.
Source: https://en.wikipedia.org/wiki/Homeostasis
Answer:
B
Explanation:
Natural selection works by selecting organisms that have unfavorable traits and killing them. However, if all the hydras are identical(from asexual reproduction), then there is no single organism that has a favorable trait over another.
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A.Populations change over time.
Answer:
A
Explanation:
it produces silk. this is common knowledge